Antifriction-bearing.



No. 740,336. PATBNTED1SBPT.29, 1903. r r G. N. TOMS. ANTIPRIGTION BEARING.

.ur'moynon FILED-IAN. 22, 1963.

I0 MODEL.

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UNIT D STATES Patented September 29, 1903.

PATENT rrrcE.

GEORGE N. TOMS, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO FRIOTIONLESS ROLLER BEARING COMPANY, OF BOSTON, MASSA- CHUSETTS, A CORPORATION OF MAINE.

ANTiFFilCTiON-BEARING.

SPEGIFJZCATION forming part of Letters Patent No. 740,336, dated September 29, 1903. Application filed January 22, 190 3. Serial No. 140,132. (No model.)

To all whom it may concern: 7

Be it known that I, GEORGE N. TOMS, a citizen of the United States of America,and a resident of Boston, in the county of Suffolk and S State of Massachusetts, have invented certain new and useful Improvementsin Antifriction- Bearings, of which the following is a-specification.

This invention relates to antifriction-bearings generally, and more particularly to that class of bearings known as roller-bearings.

An object of the present invention is to furnish a roller-bearing of improved, simplified, and efficient construction and organization whereby the rollers will revolve upon their bearing-surfaces without the slip which is customary in roller-bearings nowin use,thereby reducing the friction between the bearingsurfaces to a minimum.

With this object in view the invention consists of certain details of construction and arrangement of parts,which will be readily understood by reference to the description of the drawings and to the claim hereinafter given.

Of the drawings, Figure 1 represents an elevation of a roller-bearing embodying this invention. Fig. 2 represents a sectional plan of the same, the cutting plane being on line- 2 2 on Fig. 1. Fig. 3 represents a vertical section of the same, the cutting plane being on line 3 3 on Fig. 2.

Similar characters refer to like partsin all the figures of the drawings.

As a preamble to the detailed description of this improved bearing it is desired to state that by the term shaft as employed here-' may be rotative or stationary, according to whether the shaft is stationary or rotative. The shaft 10 preferably is provided with an enlarged sleeve 12, which is preferably secured thereto by a suitable key 13, as shown in the drawings.

The sleeve 12 is provided with an annular projection 14, the periphery of which forms a bearing-surface 15. Interposed between said sleeve 12 and the casing 11 are a series of rollers 16, having bearings in separatinglarger diameters 18 never contact with the periphery of said sleeve, the inner faces of said enlarged portions engage with said annular projection 14 to prevent lateral movement of the said rollers.

The casing 11 is provided with a split ring 28, which is fitted to the interior of said casing 11 and the inner. diameter of which is somewhat less than that of the casing 11 and extends slightly beyond the bearing-surfaces '19 on said casing.

In order to facilitate the assembling of the various parts of the hearing, the casing 11 is made in two parts, one

of which, 20, is secured to the body portion 11 by suitable securing-screws 21. The outer faces of the casing 11 and the part 20 are provided with an annular, projection'22, which projects beyond the separating-rings 17 and to which are fitted the dust-caps 23, which cover the ends of the rollers and the separating-rings 17 and are each provided at a point near the shaft 10 with an, annular lip 24, projecting into a depression 25 in the face of the said sleeve 12.

The rollers 16 are provided with trunnions 26, which have bearings in the separating' rings 1'7, although it is obvious that theend portions 18 could be provided with hearings in said separating-rings equally as well, if desired;

It will be seen from the foregoing that the cylindrical surface of the reduced portion 27 coacts with the bearing-surface 15 upon the annular projection 14, forming a part of the sleeve 12, while the cylindrical surface of the enlarged portions 18 of the rollers coact with the bearing-surfaces 19 on said casing 11. This in itself would make a very efficient roller-bearing; but it is found that the most efficient hearing would be secured when the rollers were constructed sci that the diameter of the portions 18 would be of the same relative proportions to the diameter of their bearing-surfaces on the casing 11 that the reduced portions 27 is to the diameter of its bearingsurface on the sleeve 12that is to say, the enlarged portions 18 in making one complete revolution would travel through the same angle on said casing 11 that the reduced portion 27 is traveling through about said sleeve 12 in making a complete revolution. In other words, the enlarged portions 18 would be of such a diameter relative to the diameters of their bearing-surfaces and the reduced portion 27 of such a diameter relative to the diameter of its bearing-surface that each'of these sections of the rollers 16 would make a complete revolution on their bearing-surfaces simultaneously without any slip thereon taking place. This is a very important feature of this invention, as by this construction the friction between the various parts is reduced to a minimum.

Having thus described my invention, I claim-- An antifriction device comprising a shaft; a sleeve keyed thereto and having a ringshaped projection formed upon its cylindrical surface; a casing upon the inner cylindrical Wall of which ride the end portions of each of a plurality of rollers; a split ring fitted in said casing opposite said ring-shaped projection on the sleeve; said plurality of rollers formed each with a reduced middle portion which rides upon the cylindrical surface of said ring-shaped projection; a pair of separating rings which are disconnected from each other and which carry said rollers; and apair of caps.

Signed by me at Boston, Massachusetts, this 15th day of January, 1903.

- GEORGE N. TOMS. Witnesses:

WALTER E. LOMBARD, EDNA O. CLEVELAND. 

